Ejector pawl



JUL 19 1926 w. PETERSON EJECTOR PAWL Filed Nov. 15, 1924 Patented Jan. 19, 1925e UNITED STATES PATENT OFFICE.

WILLIAM PETERSON, 0F BROOKLYN, NEW YORK, ASSIGNOR OF ONE-FOURTH TO CHARLES E. STEWART, OF ST. PAUL, MINNESOTA.

EJECTOR PAWL.

Application led November 15, 15324. Serial No. 750,129.

To all whom it may concern:

Be it known that I, VILLIAM PETERSON, Va citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Ejector Pawls, of which the following is a specification.

My invention relates to a type-slug casting machine and more particularly to means designed to operate automatically upon jamming or failure ofthe ejecting mecha-y nism to function, in order to prevent the usual damage to the `mold liners and to the machine generally. p

A prime aim is to produce a means of this character which is simple, practical and inexpensive, and capable of standard use as an attachment or substitute for parts in the present standard type-slug casting or equivalent machines, and for use with the ejecting mechanism thereof. Y Another object is to provide a construc- ,tion wherein the safety parts are built into or form an attachment on the link which actuates the ejector slide or the equivalent in such a machine.

A further desideratum is to produce an automatic break-joint connection between the ejector link and its operating rod or shaft.

Additional objects and advantages will be pointed out in part and otherwise become apparent from a consideration of the description hereinafter following and lwhich is to be taken in connection with accompanying drawings illustrating operative embodiments.

In said drawings z-e- Figure 1 is a View in perspective, illustrating my improvements in connection with a type-slug castinginachine, the latter being but partially shown in dotted lines;

Figure 2 is a perspective View of the ejector link embodying my improvements;

Figure 3 is a perspective view of the displaceable bearing arm used in connection with the ejector link and Figure 4 is a fragmentary side elevation of a modified Olm of ejector and improvements.-

Referring speciically to the drawings, wherein similar characters of reference designate like or corresponding parts A indicates a link or lever adapted for pivotal connection at itsforward end B to an ejector head or blade (not shown) which ejects the slugs'from the usual slotted disk mold in a type-slug casting machine C. Said link is moved forwardly and substantially horizontally for the ejecting operation by a rod or shaft D, the latter being moved forwardly and backwardly for the purpose aforesaid by appropriate parts of the machine forming no part'of the present invention. All of the parts described are usual and standard'in type-slug casting machines and have been referred to merely for the purpose of giving a clear understanding of the construction, operation and advantages of my improvements whichwill now be described.

At the rear end, link A has an extension or shoe 10 fastened detachably thereto as by bolts 11 passing through lapped parts thereof. Shoe 10 need not be a separate part of the link A, but may be integral therewith, thus per se being of usual construction and as shown in the modified form of Figure 4. A sem'i-circularnotch 12 is undercut in the link as at shoe 10 and a similar notch 13 is formed in a displaceable bearing arm 14. Notches 12 and 13 collectively form a round opening in which the rod D is received and on which the link A is journaled or pivoted. Bearing arm 14 is of substantially the same width as and bears against the under surface of shoe 10 and has ears 15 which engage opposite sides of a dependent or stub 16 rigid with the shoe 10 and pivoted to the latter by a bolt 17. A detachable vertical bolt or rod 18 is slidably mounted in an opening of shoe 10 and passes through holes suitably enlarged relatively thereto in said bearing arm 14 and in a bar 19 of cantilever type. The cantilever bar 19 is disposed above the shoe 10 and rests and is fulcrummed on an arcuate surface 20 of a block 21 secured to the top of shoe 10. Rising through an opening in cantilever 19, enlarged with respect thereto and located .91.1

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the side of block 21, opposite to bolt 18, is a post 22 fastened to shoe 10. Surrounding post 22 above and engaging cantilever 19 is an expansive coil spring 23 which is held in place and has its tension variable by a nut 2l threaded on the upper end of .said post. A vasher 25 is preferably interposed between spring 23 and nut In the construction described, the bearing arm le is depressible or displaceable against the tension of spring 23, so as to break joint with the shaft or rod I) automatically if the ejector of the machine should jam. The distal end of the arm 1-1- is preferably beveled as at 26 to facilitate entrance of shaft D into the opening` 12---13l Adjacent the lower end, stub or dependent 16 carries a bolt 27 which acts as a back stop in operation of the machine by engagement with the wing pin, an elevator shaft or other part of the typeslug casting machine.

Presuming a type-slug casting machine equipped with my improvements to be in operation," the rod B moves forwardly and rearwardly so as to cause ejection of the slugs on its forward strokes. If the ejector mechanism of said machine should become jammed or otherwise fail to operate, due, for instance, to failure to have the length of the mold liner and ejector blade correspond, a hot slug, or failure to set front trimming knives to correspond with the sides of the slug to be ejected, the link A will re` main stationary and rod D will be moved forwardly by the machine relatively thereto, thus automatically depressing or displacing arm 1st from, its fulcrum 17, or in other words, breaking joint with said rodl D. 'lhis action is suggested by the dot-dash lines in Figure 1. Said movementof arm 14C slides bolt 1S downwardly which rocks cantilever 19 aga-inst the tension of spring thus avoiding breakage or damage to mold liners or any of the parts by continued operation of the machine before the jammed condition is remedied. In most instances, the arm 14 does not completely release rod D and thus on the condition aforesaid being remedied, the spring 23 automatically restores the link A and arm 14 to journaled connection with shaft D.

The present improvement may be built into the ejector link A of standard typeslug casting machines and serve as initial equipment or as an attachment, and par ticularly as a standard attachment for the different standard type-slug casting machines. The partieularunitary organization of the improvements with respect to the link A forms a radical advancement and. gives a practical solution of the ejector jamming problem of such long standing in the art.

A modified form is illustrated in Figure 1; The link` E thereof corresponds to link A and .shoe ,10 of the preceding form block or bracket 33 fixed on the link E has a pin 3st pivotally connecting cantilever 30 thereto. Bolt 32 is merely longer than bolt 18 so as to mount an expansive coil spring 35 thereon, which bears against the under surface of arm 14. The spring 35 in this form, urges arm 111 to normal position and resists the displacement of the parts similar to spring 23 and it may have its tension regulated through adjustment of a nut 36 and washer 37 on the bolt 32. rlfhe remaining parts are similar to corresponding ones in the previous form and have been so designated. of bolt 22 and spring` 23 in this form, may differ from the previous form as shown.

Various changes may be resorted to within the spirit and scope of the invention and hence no limitation as to details is to.

be implied from consideration of the specific embodiments set forth.

I claim 1. A link of the class described, in combination with an operating means therefor, a bearing arm on said link and pivoted thereto, a connecting element slidably mounted on the link operatively connected to said arm, a lever connected to said element, a stem on the link, a spring on said stem engaging said lever to normally main tain the arm engaged with said operating means, said arm being automatically displaceable against the tension of said spring to release the driving connection upon failure of the link to operate.

2. A link of the class described, in combination with an operating means therefor, a dependent adjacent the rear .end of said link, a bearing arm pivoted to said depend ent and normally engage-d with said operating means, a connecting element slidably mounted on the link operatively connected to said arm, a lever connected to said element, a stem on the link, a spring on said stem engaging said lever to normally maintain the arm engaged with said operating means, said arm being automatically displaceable against the tension of said spring to release the driving connection upon failure of the link to operate,land a stop on said dependent engageable with a part of the machine in which the link is used.

3. In a device of the class described, a link, operating lmeans therefor engaging a` depressionA in the lower surface of said link and adapted to operate in a direction longitudinal of said link, a bearing arm on said link having a depression complemental to said first-named depression, resilient means The proportions,

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normally maintaining said link and arm in a position with said operating means seated in said depressions, said arm having a portion extending beyond the depression in diverging relation to the lower surface of said link, the depth of said depressions being such that upon undue resistance to movement of said link said means may leave said depressions and ride against the lower surface of said link, whereby return Inove- 10 ment of said operating means may cause automatic return into said depressions.

WILLIAM PETERSON. 

